syensson



(No Model.) 2 SheetsSheet 1.

G. A. SVENSSON.

' MAGHINE FOR BENDING RINGS.

' No. 263,991. Patented Sept. 5, 1882.

. (No Model.) 2 Sheets-Sheet 2. O. A. SVENSSON.

MACHINE IOR BENDING RINGS. No. 263,991. Patented Sept. 5, 1882.

NITED STATES PATENT @FFIGE.

GLAES A. SVENSSON, O F' BUFFALO, NEW YORK, ASSIGNOR TO WILLIAM W.OLIVER, OF SAME PLACE.

MACHINE FOR BENDING RINGS.

SPECIFICATION forming part of Letters Patent No. 263,991, datedSeptember 5, 1882.

Application filed March 28,1882. (No model.)

all whom it may concern:

Be it known that I, ULAES A. SvENssoN, of the city of Buffalo, in thecounty of Erie and State of New York,have invented new and 5 usefulImprovements in Machines for Bending Rings from Bars, of which thefollowing is a specification.

This invention relates to improvements in that class of machines whichare employed by IO jewelers for bending finger and other rings fromrolled bars.

The object of this invention is to produce a machine which is simple anddurable in construction, and which can be easily operated by hand.

My invention consists of the peculiar construction of the machine, aswill be hereinafter fully described, and pointed out in the claims.

In the accompanying drawings, consisting of two sheets, Figure 1 is aside elevation of my improved machine. Fig. 2 is a front elevationthereof. Fig.8 is a longitudinal vertical section. Figs. 4 and 5 areelevations of different sides of the former. Fig. 6 is a side elevationof my improved machine, showing a modified construction of themeans'whereby the former is held in place. Fig. 7 is a front elevationthereof. Fig. 8 is a cross-section of the bender and former on anenlarged scale.

Like letters of reference refer to like parts in the several figures.

Arepresentsthel'rameof the machine, which is secured to a work-bench ortable, B, by a screw-bolt, b, or other suitable means.

0 is a horizontal bearing cast with the frame A,and c is a horizontalshaft supported in said bearing, and provided at one end with ahandlever, D, by which the shaft can be turned in its bearing.

0 is a collar or enlargement, which is formed at the opposite end of theshaft 0, and seated in a suitable recess in the bearing 0. The collar atone end of the shaft and the hand-lever at its opposite end prevent theshaft from 45 moving lengthwise in the bearing.

E represents the bender projecting horizontally from the end of theshaft 0, and arranged eecentrically on the same, so that by turning theshaft 0 the bender E will move in the are ofa circle about the axis ofthe shaft 0. The bender E is made cylindrical, and is preferabl yprovided with several short cylindrical faces decreasing in diameterfrom the shaft toward the end of the bender, as shown.

F represents the former, secured to the frame A of the machine below thebender E in such a position that the bender E will close upon the upperside of the former by turning the shaft 0 and hand-lever D toward theformer. The former F is provided with several cylindrical facesincreasing in diameter from the frame of the machine toward the end ofthe former, and corresponding in number and arrangement with the facesof the bender. As represented in Figs. 1 and 3, the former F is mountedon a horizontal bolt, f, which is socured to the frame A, and upon whichthe former is held by a screw-nut, f. Upon releasing the latter theformer can be turned on the boltf, and by tightening the nut the formeris secured in the desired position. Each cylindrical face of the formeris preferably provided with a number of concave working-faces, g, eachof which can be brought in the proper position to operate in connectionwith the corresponding cylindrical faces of the bender by turning theformer. The several working-faces g on the same peripheral face of theformer are curved lengthwise, concentric with the curvature of thecorresponding cylindrical face of the bender; but each face 9 is made ofdifierent shape in cross-section to enable bars of correspondingcross-sections to be bent between the contiguous faces of the bender andformer. The faces g represented in Fig. 4 85 are plain and adapted forbending bars of rectangular cross-section, while the faces 9 representedin Fig. 5 are curved crosswise and adapted to bend bars having a convexor rounded cross'section. .Working-faces of angular or othercross-sections may be employed, in accordance with the form of the barsto be bent. As represented in Figs. 6 and 7, the former F is seatedbetween two concave jaws, H, which are attached to the frame A, andwhich; are sufficiently elastic to permit the former to be clampedbetween the jaws by tightening a bolt, h, and to enable the former to bereleased, so that it can be turned in itsseat by loosening the bolt IL.

I is a vertical gage-plate, which is secured to the end of a horizontalbolt, t. The latter slides in an opening in the frame A, in which it issecured by a set-screw,t. The gage-plate is adjusted to be in line withor near the inner or rear edges of those faces of the bender and formerbetween which it is desired to bend a bar, as represented in Fig. 1, andit forms a rest against which the bar is placed and by which the bar isretained in a position at right angles to the axes of the bender andformer, thereby preventing the bar frombeing bent spirally. Thegage-plate being properly adjusted, the end of the bar to be bentinto aring is placed on that peripheral face of the former which will producea ring of the desired diameter, and on the concave working-face gof thisface, which corresponds with the form of the bar to be bent. The benderis now swung down upon the bar by means of the hand-lever, asillustrated in Fig. 8, with the proper pressure to bend that portion ofthe bar which is clamped between the bender and former to the curvatureof their contiguous faces. The bender is then raised and the bar pushedforward, so as to bring the next adjacent unbent portion of the barbetween the bender and former, when the bender is again lowered and thisportion of the bar bent. This operation is repeated until the bar hasassumed the form of a true ring which surrounds the bender. Thelatter isthen raised and the ring removed therefrom. ,The eccentricity of thebender on its shaft is very small, and the leverage with which the poweris exerted upon the bar to be bent is consequently comparatively large,thus enabling the operator to apply the requisite pressure with verylittle effort. I claim as my invention- 1. In a machine for bending barsintorings,-

the combination of a stationary former,F, having one or more concaveworking-faces, and a movable cylindrical bender, E, securedeccentrically to the actuating-shaftc, substantially as set forth.

2. In a machine for bending rings from bars, the combination of abender, E, and former F, each provided with several faces decreasing indiameter on the bender and increasing in diameter on the former in thesame direction, substantially as set forth.

3. The combination, with the frame A, provided with the bearing 0, ofthe shaft 0, actuating-lever D, eccentric bender E, and stationaryformer F, substantially as set forth.

4. The combination, with a movable bender, E, secured eccentrically tothe actuating-shaft c, of a stationary former, F, and means whereby thesame can be turned on its axis to present different portions of itssurface to the movable bender, substantially as set forth.

5. The combination, with the bender E and former F, of the gage-plate I,arranged at right angles to the axes of the bender and former,substantially as set forth.

6. The combination, with the bender E an '1 former F, of the gage-plateI, arranged at right angles to the axes of the bender and former, andmeans whereby said gage-plate can. be secured opposite differentportions of the bender, substantially as set forth.

7. The combination, with the frame A, provided with recessed jaws H, ofa stationary former F, clamped between thejaws H, and a movable bender,E, secured eccentrically to the actuating-shaft c, substantially as setforth.

O. A. SVENSSON.

Witnesses JNo. J. BONNER, CHAS. F. GEYER.

